Swiss ball plank for stability
Hold a plank position on your elbows with a Swiss ball, keeping your shoulder blades level with your pelvis and your back flat — progress to the “stir the pot” variation by drawing slow circles with the ball when you’re ready.
Seated band rotation for trunk isolation
Sitting on a Swiss ball or chair with a resistance band, rotate through your trunk and ribcage rather than pulling with your arms, aiming for eight to ten reps on each side.
Dumbbell side bends for the obliques
Slowly slide a dumbbell, kettlebell, or filled water bottle down your leg to knee height, keeping the lower body still and focusing the movement through the ribs — ten slow, controlled reps each side.
